示例#1
0
def process_file(filename):
  ans = []
  try:
    f = file(filename).read()
    for line in range(32):
        offset = line*2048
        vbiraw = np.array(np.fromstring(f[offset:offset+2048], dtype=np.uint8), dtype=np.float32)
        for tl in np.arange(1.05,1.2,0.05):
         for th in np.arange(2.1,2.4,0.05):
          for g in np.arange(1.1,5.2,1.0):
           for go in np.arange(1.1,5.2,1.0):
            #thresh_low=1.15 thresh_high=2.10 gauss_sd=1.10 gauss_sd_offset=1.10
            v = Vbi(vbiraw, thresh_low=tl, thresh_high=th, gauss_sd=g, gauss_sd_offset=go)
            tmp = v.find_offset_and_scale()
            if tmp:
                packet = v.deconvolve()
                guessview.draw(vbiraw, v.g.convolved*256)
                print printer.do_print(packet), "thresh_low=%1.2f thresh_high=%1.2f gauss_sd=%1.2f gauss_sd_offset=%1.2f" % (tl, th, g, go), line
            else:
                packet = None
                print "no teletext in line", line        
        
  except IOError:
    pass

  return (filename, ans)  
示例#2
0
def process_file(filename):
  ans = []

  vbiraw = np.zeros((2048,), dtype=np.uint8)

  interp_x = (np.arange(0,1440,1.0) * 5.112 / 4.05) + 50
  interp_y = np.zeros(1440, dtype=np.float32)
  scaler = interp1d(interp_x, interp_y, 
                   kind='linear', copy=False, 
                   bounds_error=False, fill_value=50)

  try:
    f = file(filename).read()
    for line in range(0,1000000):
       if (line % 17) in [9]:
        offset = line*1600
        interp_y[:] = np.fromstring(f[offset:offset+1440], dtype=np.uint8)
        for bw in np.arange(3.891,3.897,0.01):
         interp_x[:] = (np.arange(0,1440,1.0) * 5.112 / bw) + 90
         vbiraw = scaler(np.arange(0, 2048, 1)) + 20
         for tl in np.arange(1.21,1.22,0.02):
          for th in np.arange(3.01,3.02,0.02):
           for g in np.arange(1.751,2.1,0.5):
            for go in np.arange(1.751,2.1,0.5):
             #thresh_low=1.15 thresh_high=2.10 gauss_sd=1.10 gauss_sd_offset=1.10
             v = Vbi(vbiraw, thresh_low=tl, thresh_high=th, gauss_sd=g, gauss_sd_offset=go, offset_low=55.0, offset_high=150.0, 
                               find=[Kalejdoskop, Medicina, Komentarii, Finans, Ekonomika, Teleinf, Automagazin])
             tmp = v.find_offset_and_scale()
             if tmp:
                 packet = v.deconvolve()
                 guessview.draw(vbiraw, v.g.convolved*256)
                 print printer.do_print(packet), "thresh_low=%1.2f thresh_high=%1.2f gauss_sd=%1.2f gauss_sd_offset=%1.2f bw=%1.3f" % (tl, th, g, go, bw), line, line%17
                 sys.stdout.flush()
             else:
                 packet = None
                 #print "no teletext in line", line        
        
  except IOError:
    pass

  return (filename, ans)